Pedicle screw extractor

Abstract

The utility model relates to a pedicle screw extractor, comprising: a control assembly, the control assembly comprising a control cylinder and a connecting groove, the control cylinder being internally provided with the connecting groove; the top end of the linkage assembly extends into the connecting groove, the linkage assembly comprises a linkage rod, a rotating cylinder and a linkage frame, the rotating cylinder is arranged at the bottom end of the linkage rod and connected with the linkage frame, the central axis of the linkage frame coincides with one diameter of the linkage frame, and the control cylinder is fixedly connected with the linkage rod. Through the use of the grip assembly, the control assembly and the linkage assembly, the pedicle screw and the human bone substance can be separated without screwing an inner hexagonal hole, so that the phenomenon of screw slipping can be greatly reduced, the linkage frame on the rotating cylinder is inserted between two plates at the top end of the pedicle screw, and then the grip is held to control the control assembly and the linkage assembly to rotate, so that the pedicle screw can be separated from the human bone substance. The pedicle screw is controlled by the control assembly and the linkage assembly to rotate and break away from the human body.

Description

Technical Field

[0001] The invention belongs to the field of nail removers, in particular to a pedicle nail remover. Background Art

[0002] The pedicle screw-rod internal fixation system is mainly used for the treatment of spinal diseases such as spondylolisthesis, spinal tumors and spinal fractures. The existing pedicle screw-rod internal fixation system usually consists of pedicle screws, top screws and screw rods. The pedicle screws are driven into the vertebral body, the top screws are directly screwed into the pedicle screws, the screw rods are locked, and multiple pedicle screws are connected through the screw rods to achieve spinal fixation.

[0003] After the patient recovers, the pedicle screw-rod internal fixation system usually needs to be removed. When removing it, a screwdriver needs to be inserted into the hexagonal hole at the top of the pedicle screw, and the pedicle screw needs to be rotated to disengage it. However, during the insertion of the pedicle screw, the hexagonal hole may be thread-slipped due to the large torque of the drill bit. After the operation, during the patient's recovery process, the surrounding soft tissue will also grow into the hexagonal hole, resulting in thread slippage when removing the screw. Therefore, a pedicle screw remover is proposed. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the following technical problems in the prior art: after the patient recovers, the pedicle screw-rod internal fixation system usually needs to be removed. When removing it, a screwdriver needs to be inserted into the hexagonal hole at the top of the pedicle screw and the pedicle screw is rotated to disengage it; however, during the insertion of the pedicle screw, the hexagonal hole may slip due to the large torque of the drill bit; and after the operation, during the patient's recovery process, the surrounding soft tissue will also grow, resulting in slippage when removing the screw.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a pedicle screw remover, comprising:

[0007] A control assembly, the control assembly comprising a control tube and a connection groove, and the connection groove is provided inside the control tube;

[0008] A linkage assembly, the top end of which extends into the connection groove, the linkage assembly comprises a linkage rod, a rotating cylinder and a linkage frame, the bottom end of the linkage rod is provided with a rotating cylinder, the rotating cylinder is fixedly connected to the linkage frame, the central axis of the linkage frame coincides with a diameter of the linkage frame, and the control cylinder is fixedly connected to the linkage rod;

[0009] A grip assembly is screwed onto the two sides of the control tube.

[0010] As a preferred technical solution of a pedicle screw remover, the bottom of the connecting rod is grooved and hollowed out, and the bottom of the connecting rod is divided into two parts and both are connected to the top of the rotating cylinder;

[0011] The structural weight of the nail remover is reduced while the structural strength is ensured.

[0012] As a preferred technical solution of a pedicle screw remover, the control assembly further includes a recovery groove, the handle assembly includes a handle, a connecting arm and a connecting column, the inner side of the recovery groove is screwed with a connecting column, and a connecting arm is connected between the connecting column and the handle;

[0013] The grip assembly can be used to hold and control the rotation of the manipulation assembly and the linkage assembly.

[0014] As a preferred technical solution of a pedicle screw remover, the control assembly further comprises a plug, the top of the connecting groove is plugged with the plug, and the bottom end of the plug abuts against the top end of the linkage rod;

[0015] The plug can close the opening at the top end of the connecting groove.

[0016] As a preferred technical solution of a pedicle screw remover, the control assembly further includes a locking ring and an abutment ring, the control tube is threadedly connected with the locking ring, the top of the locking ring is provided with an abutment ring, and the abutment ring is movably connected to the connecting column;

[0017] Put the locking ring on the bottom end of the connecting rod, and then rotate the locking ring to make the abutment ring on the top of the locking ring abut against the connecting column, so that the connecting column is fully expanded.

[0018] As a preferred technical solution of a pedicle screw remover, the control assembly further comprises an elastic arc plate, the elastic arc plate is made of an elastic sheet, the elastic arc plate is distributed on two opposite sides of the inner wall of the recovery groove, and the elastic arc plate is movably connected to the connecting column;

[0019] The elastic arc plate can lock the connecting column into the recovery groove.

[0020] The beneficial effects of the pedicle screw remover of the present invention are as follows: by using a handle assembly, a control assembly and a linkage assembly, it is not necessary to separate the pedicle screw and the human bone by twisting the inner hexagonal hole, thereby greatly reducing the occurrence of thread slippage, inserting the linkage frame on the rotating cylinder between the two plates at the top of the pedicle screw, and then holding the handle to control the rotation of the control assembly and the linkage assembly, and controlling the pedicle screw to rotate and separate from the human body through the control assembly and the linkage assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a bottom view structural schematic diagram of the control assembly of the present invention;

[0024] Figure 3 It is a bottom view structural schematic diagram of the linkage assembly of the present invention;

[0025] Figure 4 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0026] Figure 5 For the present invention Figure 1 Schematic diagram of the local enlarged structure of part B.

[0027] Figure numerals: control assembly - 100, control cylinder - 101, connecting groove - 102, plug - 103, locking ring - 104, abutment ring - 105, recovery groove - 106, elastic arc plate - 107, linkage assembly - 200, linkage rod - 201, rotating cylinder - 202, linkage frame - 203, handle assembly - 300, handle - 301, connecting arm - 302, connecting column - 303. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0032] like Figure 1-5 As shown, the present invention provides a pedicle screw remover, comprising:

[0033] A control assembly 100, the control assembly 100 comprises a control tube 101 and a connection slot 102, and the connection slot 102 is provided inside the control tube 101;

[0034] A linkage assembly 200, the top end of which extends into the connection groove 102, the linkage assembly 200 comprises a linkage rod 201, a rotating cylinder 202 and a linkage frame 203, the bottom end of the linkage rod 201 is provided with a rotating cylinder 202, the rotating cylinder 202 is fixedly connected to the linkage frame 203, the central axis of the linkage frame 203 coincides with a diameter of the linkage frame 203, the control cylinder 101 is fixedly connected to the linkage rod 201;

[0035] A handle assembly 300 is screwed onto each of the two sides of the control tube 101 .

[0036] As a preferred technical solution of a pedicle screw remover, the bottom of the connecting rod 201 is grooved and hollowed out, and the bottom of the connecting rod 201 is divided into two parts and both are connected to the top of the rotating cylinder 202;

[0037] The structural weight of the nail remover is reduced while the structural strength is ensured.

[0038] As a preferred technical solution of a pedicle screw remover, the control assembly 100 further includes a recovery groove 106, and the handle assembly 300 includes a handle 301, a connecting arm 302 and a connecting column 303. The inner side of the recovery groove 106 is screwed with the connecting column 303, and the connecting arm 302 is connected between the connecting column 303 and the handle 301;

[0039] The grip assembly 300 can be used to hold and control the rotation of the manipulation assembly 100 and the linkage assembly 200 .

[0040] As a preferred technical solution of a pedicle screw remover, the control assembly 100 further includes a plug 103, the top of the connecting groove 102 is plugged with the plug 103, and the bottom end of the plug 103 abuts against the top end of the linkage rod 201;

[0041] The plug 103 can close the opening at the top end of the connecting groove 102 .

[0042] As a preferred technical solution of a pedicle screw remover, the control assembly 100 further includes a locking ring 104 and an abutment ring 105. The control cylinder 101 is threadedly connected with the locking ring 104. The top of the locking ring 104 is provided with an abutment ring 105. The abutment ring 105 is movably connected to the connecting column 303.

[0043] The locking ring 104 is put on the bottom end of the linkage rod 201 and then rotated to make the abutting ring 105 on the top of the locking ring 104 abut against the connecting column 303 so that the connecting column 303 is fully unfolded.

[0044] As a preferred technical solution of a pedicle screw remover, the control assembly 100 further includes an elastic arc plate 107, which is made of an elastic sheet and is distributed on two opposite sides of the inner wall of the recovery groove 106, and the elastic arc plate 107 is movably connected to the connecting column 303;

[0045] The elastic arc plate 107 can lock the connecting column 303 into the recovery groove 106 .

[0046] The specific implementation method is: respectively controlling the two gripping components 300 to swing away from the locking of the elastic arc plate 107 and to disengage from the recovery groove 106, and then rotating the locking ring 104 so that the abutting ring 105 at the top of the locking ring 104 abuts against the connecting column 303, so that the connecting column 303 is fully unfolded;

[0047] Insert the linkage frame 203 on the rotating cylinder 202 between the two plates at the top of the pedicle screw, then hold the handle 301 to control the rotation of the control component 100 and the linkage component 200, and control the pedicle screw to rotate and separate from the human body through the control component 100 and the linkage component 200.

[0048] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pedicle screw remover, characterized in that: include: A control assembly (100), the control assembly (100) comprising a control tube (101) and a connection groove (102), the connection groove (102) being provided inside the control tube (101); A linkage assembly (200), wherein the top end of the linkage assembly (200) extends into the connection groove (102), the linkage assembly (200) comprises a linkage rod (201), a rotating cylinder (202) and a linkage frame (203), the bottom end of the linkage rod (201) is provided with a rotating cylinder (202), the rotating cylinder (202) is fixedly connected to the linkage frame (203), and the control cylinder (101) and the linkage rod (201) are fixedly connected; A grip assembly (300), wherein two sides of the control tube (101) are respectively screwed with a grip assembly (300).

2. The pedicle screw remover according to claim 1, characterized in that: The bottom of the connecting rod (201) is grooved and hollowed out, and the bottom of the connecting rod (201) is divided into two parts, both of which are connected to the top of the rotating cylinder (202).

3. The pedicle screw remover according to claim 1, characterized in that: The control assembly (100) further comprises a recovery groove (106), and the handle assembly (300) comprises a handle (301), a connecting arm (302) and a connecting column (303). The connecting column (303) is screwed on the inner side of the recovery groove (106), and the connecting arm (302) is connected between the connecting column (303) and the handle (301).

4. The pedicle screw remover according to claim 3, characterized in that: The control assembly (100) further comprises a plug (103), the top of the connecting groove (102) is plugged with the plug (103), and the bottom end of the plug (103) abuts against the top end of the linkage rod (201).

5. The pedicle screw remover according to claim 3, characterized in that: The control assembly (100) further comprises a locking ring (104) and an abutment ring (105); the control tube (101) is threadedly connected with the locking ring (104); the top of the locking ring (104) is provided with an abutment ring (105); and the abutment ring (105) is movably connected to the connecting column (303).

6. The pedicle screw remover according to claim 5, characterized in that: The control assembly (100) further comprises an elastic arc plate (107), wherein the elastic arc plate (107) is made of an elastic sheet, and the elastic arc plate (107) is distributed on two opposite sides of the inner wall of the recovery tank (106), and the elastic arc plate (107) is movably connected to the connecting column (303).

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